Plotly/Dash中Tooltip图片无法正常显示的问题求助

Hey everyone, I'm stuck on a problem with my Plotly/Dash app. The code below is supposed to show images in the tooltip when hovering over data points, but right now all I get is the point name (like "Point X") and a broken image icon—this happens both in my VSCode notebook and on an updated Chrome browser.

I checked the base64 encoding of my images separately and it works perfectly, so that doesn't seem to be the root cause. To clarify what I see: the tooltip displays the correct point label, but where the image should be, there's just that familiar broken link icon you get when an image fails to load.

Here's my full code:

from dash import Dash, dcc, html, Input, Output
import plotly.graph_objects as go

app = Dash(__name__)

img1 = "<img src='data:image/jpg;base64,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'>"

img2 = "<img src='data:image/jpg;base64,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'>"

df = {'x': [1, 2], 'y': [2, 4], 'images': [img1, img2]}
fig = go.Figure(data=go.Scatter(x=df['x'], y=df['y'], mode='markers', hoverinfo='none'))

app.layout = html.Div([
    dcc.Graph(id='graph-basic-2', figure=fig),
    dcc.Tooltip(id="graph-tooltip")
])

@app.callback(
    Output("graph-tooltip", "show"),
    Output("graph-tooltip", "bbox"),
    Output("graph-tooltip", "children"),
    Input("graph-basic-2", "hoverData"),
)
def display_hover(hoverData):
    if hoverData is None:
        return False, None, None
    
    pt = hoverData["points"][0]
    bbox = pt["bbox"]
    img_src = df['images'][pt['pointNumber']]
    
    children = [
        html.Img(src=img_src, style={"width": "100px"}),
        html.P(f"Point {pt['pointNumber']}")
    ]
    return True, bbox, children


app.run(debug=True, port=8050)

Does anyone have any idea what's going wrong here? I've checked the usual suspects like base64 formatting, but that seems to be okay. Any pointers would be really appreciated!

备注：内容来源于stack exchange，提问作者geguze